How long is the flight from London Heathrow Airport to Allentown?

Airlines like United Airlines fly from London Heathrow Airport to Allentown in about 15h 06m. The time it takes to get you to your destination can typically vary by up to . The distance between London Heathrow Airport and Allentown is about 3507 mi.

In terms of precipitation, rainfall in Allentown ranges from 69.0 - 127.0 inches per month. July is typically the wettest month, when rainfall can reach 127.0 mm. February is typically the driest time to visit Allentown when rainfall is around 69.0 mm.

If weather is an important factor for your trip to Allentown, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -2.0 C).

What is the cheapest time of day to fly from LHR to ABE?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Allentown as you normally would.

What airport do you fly into for flights to Allentown from London Heathrow?

Most people fly into Allentown-Bethlehem (ABE) if they book a flight to Allentown from London Heathrow. On average, Allentown-Bethlehem has 0 inbound flights from London Heathrow per day from 0 airlines. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.

Can I find deals for flights from Heathrow to Allentown that include hotel bookings?

Yes. In addition to deals on Heathrow to Allentown flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Heathrow to Allentown?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Allentown.

Can I find deals for business class flights from Heathrow to Allentown?

Yes. Cheapflights offers flight deals from Heathrow to Allentown by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£521+ Cheap Flights from London Heathrow Airport to Allentown

Cheap flight deals from Heathrow to Allentown

Enter your travel dates to find the best prices.

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Cheapest flights from Heathrow to Allentown
Explore the most affordable flight options available from Heathrow to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 October 2026.

Tue 10/1106:50 -

2 stops15h 06m

Tue 17/1117:36 -

1 stop13h 24m

Deal found 13/10£759

Wed 11/1106:35 -

2 stops19h 27m

Sun 15/1117:36 -

2 stops32h 04m

Deal found 13/10£765

Sun 29/1111:05 -

2 stops51h 23m

Sun 6/1217:32 -

1 stop33h 23m

Deal found 15/10£775

Sat 7/1106:50 -

2 stops15h 06m

Mon 9/1117:36 -

1 stop13h 24m

Deal found 13/10£803

Find flight deals from Heathrow to Allentown

Round-trip from	£759
One-way from	£521

United Airlines
10/11-17/11
3 total stops
28h 30m total
London to Allentown

Search Deals

Delta
4/12-31/12
1 total stop
13h 18m total
London to Allentown

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Allentown that are best for you.

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Return

Price

Cheapest return flight

Fastest return journey

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Fri 4/12

08:55-17:13

1 stop13h 18m

Allentown-Bethlehem

Wed 31/12

00:00-06:00

Nonstop0h 00m

£521

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Thu 26/11

13:35-16:56

1 stop32h 21m

Allentown-Bethlehem

Wed 31/12

00:00-06:00

Nonstop0h 00m

£616

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Tue 10/11

06:50-16:56

2 stops15h 06m

Allentown-Bethlehem

Tue 17/11

17:36-12:00

1 stop13h 24m

£759

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Wed 11/11

06:35-21:02

2 stops19h 27m

Allentown-Bethlehem

Sun 15/11

17:36-07:55

1 stop33h 19m

£765

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Sun 29/11

11:05-09:28

2 stops51h 23m

Allentown-Bethlehem

Sun 6/12

17:32-12:50

2 stops38h 18m

£786

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Sat 7/11

06:50-16:56

2 stops15h 06m

Allentown-Bethlehem

Mon 9/11

17:36-12:00

1 stop13h 24m

£803

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Fri 6/11

12:40-22:19

1 stop14h 39m

Allentown-Bethlehem

Wed 31/12

00:00-06:00

Nonstop0h 00m

£973

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Thu 26/11

14:50-19:52

2 stops34h 02m

Allentown-Bethlehem

Wed 31/12

00:00-06:00

Nonstop0h 00m

£2,362

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Sun 29/11

10:25-21:02

1 stop15h 37m

Allentown-Bethlehem

Wed 31/12

00:00-06:00

Nonstop0h 00m

£2,396

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Sun 20/12

06:30-17:21

2 stops15h 51m

Allentown-Bethlehem

Wed 31/12

00:00-06:00

Nonstop0h 00m

£8,114

Flights are sorted by cheapest return flights first.

Deals found on 13/10

Sorted by cheapest first

Best time to book a flight from Heathrow to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from Heathrow with our price prediction graph.

LHR-ABE

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

What airport do you fly into for flights to Allentown from London Heathrow?
Most people fly into Allentown-Bethlehem (ABE) if they book a flight to Allentown from London Heathrow. On average, Allentown-Bethlehem has 0 inbound flights from London Heathrow per day from 0 airlines. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.
How long is the flight from London Heathrow Airport to Allentown?
Airlines like United Airlines fly from London Heathrow Airport to Allentown in about 15h 06m. The time it takes to get you to your destination can typically vary by up to . The distance between London Heathrow Airport and Allentown is about 3507 mi.
Can I find deals for flights from Heathrow to Allentown that include hotel bookings?
Yes. In addition to deals on Heathrow to Allentown flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Allentown?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Allentown.
Can I find deals for business class flights from Heathrow to Allentown?
Yes. Cheapflights offers flight deals from Heathrow to Allentown by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flights from London Heathrow Airport to Allentown from £521

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Allentown

Cheapest flights from Heathrow to AllentownExplore the most affordable flight options available from Heathrow to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 October 2026.

Explore the most affordable flight options available from Heathrow to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 October 2026.

Best flights from Heathrow to AllentownDiscover carefully curated flight deals from Heathrow to Allentown that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 October 2026.

Discover carefully curated flight deals from Heathrow to Allentown that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 October 2026.

Last-minute flights from Heathrow to AllentownDiscover last-minute flight deals from Heathrow to Allentown. Data last updated 16 October 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Allentown. Data last updated 16 October 2026 and is based on user searches.

One-way flights from Heathrow to AllentownSearch for one-way flight options from Heathrow to Allentown. Find affordable one-way fares based on user searches. Data last updated 16 October 2026.

Search for one-way flight options from Heathrow to Allentown. Find affordable one-way fares based on user searches. Data last updated 16 October 2026.

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Related info for your journey

What airport do you fly into for flights to Allentown from London Heathrow?

How long is the flight from London Heathrow Airport to Allentown?

Can I find deals for flights from Heathrow to Allentown that include hotel bookings?

How can I find direct flights from Heathrow to Allentown?

Can I find deals for business class flights from Heathrow to Allentown?

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Cheapest flights from Heathrow to Allentown
Explore the most affordable flight options available from Heathrow to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 October 2026.

Best flights from Heathrow to Allentown
Discover carefully curated flight deals from Heathrow to Allentown that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 October 2026.

Last-minute flights from Heathrow to Allentown
Discover last-minute flight deals from Heathrow to Allentown. Data last updated 16 October 2026 and is based on user searches.

One-way flights from Heathrow to Allentown
Search for one-way flight options from Heathrow to Allentown. Find affordable one-way fares based on user searches. Data last updated 16 October 2026.